FR in poker stands for Pre-Flop Raise, and it is a statistic that shows how often a poker player enters the flop with a raise. Using this metric when playing online poker, you can gauge how tight or loose a particular opponent is.
PFR Poker Example:
Let’s say that a player is raising every 4 out of 10 pre-flop hands. Their PFR would simply be 40% in this instance. The higher the percentage is, the more aggressive the player is and the wider their pre-flop betting range is.